quasar | 5fccda50065844a012e1425d3d9d60b608c6d5dc07514d32d04b1c55a1eade36

Analysis

max time kernel
127s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2024 07:23

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

PC_Booster.exe
Size

3.1MB
MD5

81d8571af28e42e2bbe60b5118173da6
SHA1

a826876a268bb7ebcf67b050707ff8a8e05ee6ef
SHA256

5fccda50065844a012e1425d3d9d60b608c6d5dc07514d32d04b1c55a1eade36
SHA512

b6f2dc77b046e4577a996495a6a5589f6ea263e61570ff362f2fb3386dc2b5c80c63ee6ab0678b36e1e11f7a3e46a9c5ed2cf33a5fb523e6afaed0f5a38da347
SSDEEP

49152:KvyI22SsaNYfdPBldt698dBcjHF9rwmCPLoGZB3voTHHB72eh2NT:Kvf22SsaNYfdPBldt6+dBcjHF9rQ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.18:4782

Mutex

4d099eab-30e3-4c3b-bf50-bf77e2e70e0f

Attributes

encryption_key
04E6B8EB331AA0F74187E430ADEDBC1B79B631E4
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3008-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023ccb-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2952	Client.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exe

pid	Process
3364	schtasks.exe
2920	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PC_Booster.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	3008	PC_Booster.exe
Token: SeDebugPrivilege	2952	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2952	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

PC_Booster.exeClient.exe

description	pid	Process	procid_target
PID 3008 wrote to memory of 3364	3008	PC_Booster.exe	86
PID 3008 wrote to memory of 3364	3008	PC_Booster.exe	86
PID 3008 wrote to memory of 2952	3008	PC_Booster.exe	88
PID 3008 wrote to memory of 2952	3008	PC_Booster.exe	88
PID 2952 wrote to memory of 2920	2952	Client.exe	89
PID 2952 wrote to memory of 2920	2952	Client.exe	89

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\PC_Booster.exe
"C:\Users\Admin\AppData\Local\Temp\PC_Booster.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3364
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2952
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
81d8571af28e42e2bbe60b5118173da6

SHA1
a826876a268bb7ebcf67b050707ff8a8e05ee6ef

SHA256
5fccda50065844a012e1425d3d9d60b608c6d5dc07514d32d04b1c55a1eade36

SHA512
b6f2dc77b046e4577a996495a6a5589f6ea263e61570ff362f2fb3386dc2b5c80c63ee6ab0678b36e1e11f7a3e46a9c5ed2cf33a5fb523e6afaed0f5a38da347

Download Submit
memory/2952-9-0x00007FFB5BBD0000-0x00007FFB5C691000-memory.dmp

Filesize
10.8MB

Download
memory/2952-11-0x00007FFB5BBD0000-0x00007FFB5C691000-memory.dmp

Filesize
10.8MB

Download
memory/2952-12-0x000000001BC90000-0x000000001BCE0000-memory.dmp

Filesize
320KB

Download
memory/2952-13-0x000000001C630000-0x000000001C6E2000-memory.dmp

Filesize
712KB

Download
memory/2952-14-0x00007FFB5BBD0000-0x00007FFB5C691000-memory.dmp

Filesize
10.8MB

Download
memory/3008-0-0x00007FFB5BBD3000-0x00007FFB5BBD5000-memory.dmp

Filesize
8KB

Download
memory/3008-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmp

Filesize
3.1MB

Download
memory/3008-2-0x00007FFB5BBD0000-0x00007FFB5C691000-memory.dmp

Filesize
10.8MB

Download
memory/3008-10-0x00007FFB5BBD0000-0x00007FFB5C691000-memory.dmp

Filesize
10.8MB

Download